Dental floss holder



FIG. 1 is a perspective view of a dental floss holder, showing my new design;

FIG. 2 is a top plan view of FIG. 1;

FIG. 3 is a front view of FIG. 1;

FIG. 4 is a rear view of FIG. 1; and,

FIG. 5 is a side view of FIG. 1. 

The ornamental design for a dental floss holder, as shown and described. 